| abstract |
An athletic shoe includes a sole having one or more anchors, a protrusion attachable to each of the anchors, and a releasing system adapted to release the protrusions from the anchors when a predetermined condition is experienced by the sole. In one version, the releasing system includes a portion of the protrusion that is receivable in the anchor and wherein the portion and the anchor are magnetically attracted to one another. In one version, the releasing system includes a sensor that detects a condition, and the releasing system causes the protrusion to be released from the anchor when the condition exceeds a predetermined level. |